TCI Transmissions: What your opinion

I have a JW 727 WITH A BRAKE, AT 300 RUNS I PULLED IT APART AT OUR LOCAL DODGE DEALER AND THE MECHANIC THAT CHECKED IT OVER SAID I WASATED HIS TIME, THERE WAS NOTHING WRONG WITH IT, REPLACE THE SEALS AND GASKETS AND HAVE ANOTHER 250 PLUS RUNS ON IT WITH NO PROBLEMS WITH IT, THATS WITH A 5200 RPM 8 INCH STALL AND CLOSE TO 600 DYNOED HORSE POWER, BUT I DO CHANGE THE FLIUD AND FILTER AFTER 30 RUNS (2 WEEKENDS OF RACING), KEEPING FRESH FLUID , FILTER(DEALER ONLY FILTERS) AND A GOOD COOLER MAKES A TRANS LAST ALOT LONGER.. JUST MY 2 CENTS WORTH.